Yes, Prosecco, but one point is that sometimes you don't even know if the present has arrived. It is particularly annoying when you send something as a wedding present to people you may not know all that well - perhaps you know their parents - and they don't reply. That happened to us with the son, then the daughter, of friends, although we did get letters eventually, thanking us for the cheques we sent, one after about 6 months, and the other a bit sooner. The second one said what they had spent the money on, which was nice.
The DGC are not too bad at saying thank you, and I'm happy for them to do it by letter, text, phone or email.
Brendawymms, you must be a saint if you didn't do what Marelli suggested